| /* |
| * Copyright (C) 2011, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(WEB_AUDIO) |
| |
| #include "modules/webaudio/AsyncAudioDecoder.h" |
| |
| #include "modules/webaudio/AudioBuffer.h" |
| #include "modules/webaudio/AudioBufferCallback.h" |
| #include "platform/Task.h" |
| #include "public/platform/Platform.h" |
| #include "wtf/ArrayBuffer.h" |
| #include "wtf/MainThread.h" |
| #include "wtf/PassOwnPtr.h" |
| |
| namespace WebCore { |
| |
| AsyncAudioDecoder::AsyncAudioDecoder() |
| : m_thread(adoptPtr(blink::Platform::current()->createThread("Audio Decoder"))) |
| { |
| } |
| |
| AsyncAudioDecoder::~AsyncAudioDecoder() |
| { |
| } |
| |
| void AsyncAudioDecoder::decodeAsync(ArrayBuffer* audioData, float sampleRate, PassOwnPtr<AudioBufferCallback> successCallback, PassOwnPtr<AudioBufferCallback> errorCallback) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(audioData); |
| if (!audioData) |
| return; |
| |
| // Add a ref to keep audioData alive until completion of decoding. |
| RefPtr<ArrayBuffer> audioDataRef(audioData); |
| |
| // The leak references to successCallback and errorCallback are picked up on notifyComplete. |
| m_thread->postTask(new Task(WTF::bind(&AsyncAudioDecoder::decode, audioDataRef.release().leakRef(), sampleRate, successCallback.leakPtr(), errorCallback.leakPtr()))); |
| } |
| |
| void AsyncAudioDecoder::decode(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback) |
| { |
| // Do the actual decoding and invoke the callback. |
| RefPtr<AudioBuffer> audioBuffer = AudioBuffer::createFromAudioFileData(audioData->data(), audioData->byteLength(), false, sampleRate); |
| |
| // Decoding is finished, but we need to do the callbacks on the main thread. |
| // The leaked reference to audioBuffer is picked up in notifyComplete. |
| callOnMainThread(WTF::bind(&AsyncAudioDecoder::notifyComplete, audioData, successCallback, errorCallback, audioBuffer.release().leakRef())); |
| } |
| |
| void AsyncAudioDecoder::notifyComplete(ArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBuffer* audioBuffer) |
| { |
| // Adopt references, so everything gets correctly dereffed. |
| RefPtr<ArrayBuffer> audioDataRef = adoptRef(audioData); |
| OwnPtr<AudioBufferCallback> successCallbackPtr = adoptPtr(successCallback); |
| OwnPtr<AudioBufferCallback> errorCallbackPtr = adoptPtr(errorCallback); |
| RefPtr<AudioBuffer> audioBufferRef = adoptRef(audioBuffer); |
| |
| if (audioBuffer && successCallback) |
| successCallback->handleEvent(audioBuffer); |
| else if (errorCallback) |
| errorCallback->handleEvent(audioBuffer); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WEB_AUDIO) |